Ernst kassner



July 10, 1928. 1,676,560

E1. KASSNER TRANSFER MECEANISH-FOR DUPLEX ADDING MACHINES, CASE REGISTERS, ETC

Original Filed May 26, 33323 r m E m-o R: @MMM mu I Bfifiigu/ y ATTORNEYS.-

Patented July 10, 1928.

UNITED STATES PATENT OFFICE.

ERNST K ASSNER, OF BERLIN, GERMANY.

Original application filed Kay 26, 1923,

This invention relates in general to decimal stepping devices for calculating machines, more particularly for machines of the kind described in my copending application Serial No. 641,650 filed May 26th, 1923, of which this application is a division, which machines comprise two counting trains.

The object of this invention is to provide a novel decimal stepping device for such machines Whose gearing is of very simple construction and can be depended on to act perfectly accurately. This is accomplished by combining the rocking arms of the step- 16 ping pawls of corresponding digits of the two countin trains by links which are moved at each revolution of the main operating shaft of the machine. Other features of the invention will appear hereinafter.

The invention is illustrated in the drawing in which Fig. 1 is a section of the counting trains on a plane extending from the front to the back of th machine and Fig. 2 is a transverse section extending at right angles to that shown in Fig. 1.

The counting trans 1 and 2 are mounted on the shafts 3 and 4, and arranged between the counting trains 1 and 2 on a shaft 5 are 30 intermediate toothed driving wheels 6 which can be brought into engagen'ient with either of the counting trains by swinging the shaft 5 to and fro. To this end the rockable shaft 5 is mounted at the upper end of a rocker frame 7 that can be swung on a pivot or shaft 8 towards th left or right counting train as desired. The connecting line between the centers of the shafts 8 and 5 is shown in its furthest right hand position in Fig. 1, i. e. in the position in which the intermediate wheels 6 are in mesh with the right hand counting train 2. \Vhen the rocker frame 7 is turned through the angle 9 to the left, the intermediate wheels engage with the left hand counting train 1. The intermediate wheels 6 are turned in accordance with depressed keys (not shown) by a setting ear .(not shown) and the numerical values t at correspond to the depressed keys and are indicated or recorded on the one counting train or the other according to the position of the rocker frame 7 Each of the two counting trains has a number of counting disks or number disks 1 l5 and 2 that is equal to the number of digits Serial No. 641,650. Divided and this application filed September 22,

1926. Serial No. 136,942. b

provided for. Fixed to each number disk is a stepping wheel 10, 11 and a toothed gear wheel 12, 13. The intermediate wheels 6 can be made to engage with either the gear wheels 12 or the gear wheels 13, so that in one case th left counting train or in the other case the right hand counting train is operated. The stepping wheels 10, 11 are engaged by detents 14, 15 which hold the number wheels 1, 2 in the position into which they have been turned.

The decimal stepping device for the left hand counting train 1 is arranged on the rockable shaft 5 and consists chiefly of the two-ended rocking arms 16 whose number corresponds to the number of digits in the train and to whose upper short ends tens stepping pawls 18 are attached by pivots 17. The stepping pawls 18 are generally held in uplifted 0r inoperativ positions by locking members or dogs 19. Each stepping pawl 18 and its associated dog 19 are interconnected by a draught spring 20. p

A similar decimal stepping device is pro-' vided for the counting train 2 and mounted on a separate shaft 21. I It consists of twoended rocking arms 22, tens stepping pawls 24 connected by pivots 23 tdthcse arms, dogs 25, and draught springs 26 that connect the pawls and dogs.

A feature of the invention is that the two rocking arms 16 and 22 of each digit are interconnected by a separate link 27, so that the number of links corresponds'to the number of digits in a counting train. At each revolution of themain operating shaft theselinks are shifted in the direction of their length and transmit motion to the decimal stepping mechanisms, becaus each link 27 is connected by a pivot 28 to an actuating member in'the form of rocker plate 29. that is journalled on a shaft 30. Each rocker plate 29 has an anvil arm 31 that lies in the path of one of the striker arms or cams 33 fixed .on th shaft 32so as to beradially displaced with respect to each other. The operating shaft 32 is geared by wheels" (not shown) to a main operating shaft and revolves once at each operation of the machine. At each revolution of the shaft 32 the cams 33, whose number is equal to the number of digits, strike in succession against their corresponding anvil arms 31 on the rocker plates 29, so that the rockable arms 16 and 22 each execute one swinging motion when as to release it.

the main operating shaft is turned. As ion as the dogs 19 and 25 are in their uplifte positions this swinging motion has no effect on the counting trains.

But when one of the counting trains 1 or 2 steps pastthe nine, a striking pin 34 or 35 on the particular number disk in question comes into contact with a projection 36 or-37 of the dog 19 or 25 sanie from its steppin pawl 18 or 24,50 The %og 25 of the right hand countin train is 'shown in Fig. 1 in its disengage position by broken'lines 25'. As soon as the dog is shifted into its disengaging position the associated stepping pawl 24 is pulled downward by its spring into the position indicated by, broken lines 24 and when the rockable arms 16 and 22 are now deflected by the revolution of the main operating shaft the stepping-pawl 24' enga es with the stepping wheel 11 of the associated number wheel or disk 2 and. turns it round to the next number. When the number wheel turns further around its striking pin 34 or 35 lifts the dog 19 or 25 up again into the position in which it locks the ste ping pawl in its ino erative osition.

As tiie decimal stepping evice o the left hand counting train '1 is arranged on the rocking shaft 5 journalled in the rocker frame 7 there" is a danger that when the frame 7 is rocked, that is when the intermediate arms 6 are disengaged from one train and brought into engagement with the other, the position of the rockable arms 16 and 22 will be affected in such a way as to prevent the decimal step ing device from operating properly. To 0 viate this danger the following arrangement is made: The pivot 38 by which the link 27 is connected to the rockable arm 16, is positioned so that it lies on the line 39 which bisects the angle 9 through which the rockable shaft is-swung in its supporting frame or rocker frame 7. By this arrangement the rocking of the frame 7 is prevented from affecting the position of the two rockable arms 16 and 22,

or at any rate there will be practically no measurable alteration of their position, because the point 38 remains in its position of the line 39' that divides the angle 39 into two halves.

I claim 1. A decimal stepping device for machines of thekind described, comprising two multidigit counting trains, a stepping wheel for each digit of each train, a stepping pawl for each steppingwheel, a rocking arm for each stepping pawl,- a link between each rocking arm of one counting train and the and disengages the digit counting trains, a roeka rockable supporting frame for supporting.

rocking arm of the corresponding digit of the other counting train, a revoluble main operating shaft for the machine, and means for rocking either of said links with its rockin arms at each revolution'of the oper ating s aft.

2. A decimal step e shaft, a-

digit counting trains, a rocka -rockable supporting frame for supporting ing device for machines of the kind describe eompnsingltwo multithe rockable shaft, drivin'gwheels on the rockable shaft for driving one or the other counting train according to the position into which the rockable frame is rocked, a stepping wheel for each digit of each counting traimrocking arms,'-one for each stepping wheel of one counting train mounted on said rockable shaft, further rocking arms, one for each stepping wheel of the second counting train, step ing. pawls, one for each of said stepping w-eels, pivotally attached to staid rockin arms; a link between each rocking arm 0 the first counting train and the rocking arm of the correspondin digit of the other counting train; a revolu 1e operating shaft for the machi-ne;" and means for rocking either of said links withits rocking arms ateach revolution of theoperating shaft.

3. A decimal stepping device for machines of the kind described, comprisin two multil le shaft, a

the rockable shaft, driving wheels on the rockable shaft for driving'onef or the other counting train according to the position into which the rockable frame is rocked, a stepping wheel for each digit of each counting train,v rocking arms,"one for each stepping wheel of one counting train mounted on said rockable shaft, further rocking arms, one for each stepping wheel of the second counting train,'stepping pawls, one for each of said stepping whee s, pivotally attached to said rocking arms, a link pivotally attached between each rocking arm of the firstcounting train and the rockingl arm of the corresponding digit of the ot er counting train, the pivot of the link on the rocking.

arm mounted on said rockable shaft lyin on a line which halves the angle througii which the rockable shaft is swung in its supporting frame,

for the machine, and means for rocking either of saidlinks with its rocking arms at.

each revolution of the operating shaft.

-a revoluble operating shaft.

In testimony whereof Ihave signed my name to this specification.

ERNST KASSNER. 

